Global Patent Index - EP 2544276 A4

EP 2544276 A4 20150114 - POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM-ION BATTERIES, POSITIVE ELECTRODE FOR LITHIUM-ION BATTERIES, AND LITHIUM-ION BATTERY

Title (en)

POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM-ION BATTERIES, POSITIVE ELECTRODE FOR LITHIUM-ION BATTERIES, AND LITHIUM-ION BATTERY

Title (de)

POSITIV AKTIVES ELEKTRODENMATERIAL FÜR LITHIUMIONENBATTERIEN, POSITIVELEKTRODE FÜR LITHIUMIONENBATTERIEN UND LITHIUMIONENBATTERIE

Title (fr)

MATÉRIAU ACTIF D'ÉLECTRODE POSITIVE POUR BATTERIES AU LITHIUM-ION, ÉLECTRODE POSITIVE POUR BATTERIES AU LITHIUM-ION, ET BATTERIE AU LITHIUM-ION

Publication

EP 2544276 A4 20150114 (EN)

Application

EP 11750763 A 20110303

Priority

  • JP 2010048083 A 20100304
  • JP 2011054935 W 20110303

Abstract (en)

[origin: EP2544276A1] The present invention provides a positive electrode active material for lithium ion battery which attains a lithium ion battery having high safety. The positive electrode active material for lithium ion battery has a layer structure represented by the compositional formula: Li x (Ni y M 1-y )O z (wherein M represents Mn and Co, x denotes a number of 0.9 to 1.2, y denotes a number of 0.6 to 0.65, and z denotes a number of 1.8 to 2.4). When a lithium ion battery using a positive electrode mix produced by the positive electrode active material, a binder, and a conductive material in a ratio by weight of 91%, 4.2%, and 4.8%, respectively, is charged to 4.3V, and then an electrolytic solution prepared by dissolving 1 M-LiPF 6 in a mixture solvent of ethylene carbonate (EC)-dimethyl carbonate (DMC) (volume ratio 1 : 1) is used based on 1.0 mg of the positive electrode mix to measure the obtained lithium ion battery by differential scanning calorimetry (DSC) performed at a temperature rise rate of 5°C/min, a difference ”T = T1 - T2 between a first exothermic peak temperature T1 (°C) and a temperature T2 at which an exothermic strength is 1/2 of the first exothermic peak strength (T2 < T1) satisfies the equation: ”T ‰¥ 10 (°C).

IPC 8 full level

H01M 4/525 (2010.01); H01M 4/131 (2010.01); H01M 4/505 (2010.01)

CPC (source: EP KR US)

H01M 4/131 (2013.01 - EP KR US); H01M 4/505 (2013.01 - KR); H01M 4/525 (2013.01 - EP KR US); H01M 10/0525 (2013.01 - KR); H01M 2004/021 (2013.01 - EP US); Y02E 60/10 (2013.01 - EP)

Citation (search report)

  • [I] US 2003211391 A1 20031113 - CHO JAE-PHIL [KR], et al
  • [A] EP 1742281 A1 20070110 - MITSUBISHI CHEM CORP [JP]
  • [A] EP 1391950 A1 20040225 - YUASA BATTERY CO LTD [JP]
  • [A] KIM J ET AL: "Improvement of 12V overcharge behavior of LiCoO2 cathode material by LiNi0.8Co0.1Mn0.1O2 addition in a Li-ion cell", JOURNAL OF POWER SOURCES, ELSEVIER SA, CH, vol. 153, no. 2, 28 February 2006 (2006-02-28), pages 345 - 349, XP027937491, ISSN: 0378-7753, [retrieved on 20060228]
  • [A] JAEPHIL CHO ET AL: "Comparison of Overcharge Behavior of AlPO[sub 4]-Coated LiCoO[sub 2] and LiNi[sub 0.8]Co[sub 0.1]Mn[sub 0.1]O[sub 2] Cathode Materials?in?Li-Ion?Cells", JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 151, no. 10, 1 January 2004 (2004-01-01), pages A1707, XP055154222, ISSN: 0013-4651, DOI: 10.1149/1.1790511
  • [A] JAEPHIL CHO ET AL: "SYNTHESIS, THERMAL AND ELECTROCHEMICAL PROPERTIES OF AlPO4 COATED LiNi0.8Co0.1Mn0.1O2 CATHODE MATERIALS FOR Li-ION CELL", JOURNAL OF THE ELECTROCHEMICAL SOCIETY, ELECTROCHEMICAL SOCIETY, vol. 151, no. 11, 21 October 2004 (2004-10-21), pages A1899 - A1904, XP002719510, ISSN: 0013-4651, DOI: 10.1149/1.1802411
  • See references of WO 2011108654A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 2544276 A1 20130109; EP 2544276 A4 20150114; CN 102782910 A 20121114; CN 102782910 B 20150624; JP 5934088 B2 20160615; JP WO2011108654 A1 20130627; KR 20120132541 A 20121205; TW 201145658 A 20111216; TW I423505 B 20140111; US 2012326098 A1 20121227; WO 2011108654 A1 20110909

DOCDB simple family (application)

EP 11750763 A 20110303; CN 201180012147 A 20110303; JP 2011054935 W 20110303; JP 2012503253 A 20110303; KR 20127025889 A 20110303; TW 100107076 A 20110303; US 201113581546 A 20110303